Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ff14e8158a4bd964fdc870579afabd70086b23cd5437684f2cdc6ba540c33976' 
  AND token = 'Of38MHzNXZYH5d36MzUJIhBkYg41iUDXVxD633luSv4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}